ElastAlert is a very nice package that can be installed on top of the ELK stack. It is a free replacement of the X Pack watcher product. The basic idea of the package is to use rules defined as yaml file in order to describe each alerting rule. You will find a nice introduction of the package possibilities here.
Elastic Search released the version 6.1 of its stack, and once again there are a tons of good new things but this is once again a disappointment for developers writing plugins for Kibana. Once again the compatibility is broken and the code has to be changed. This is painful and I stopped writing plugins for it. I will probably still port the traffic lights plugin for it. (I already have 3 different versions of it, one per Elastic flavour)
Elastic search released the latest version of its stack. There are of course a lot of cool new things, but we also feel that they, one step after the other push people to a licence model. I have no problem with that but it makes the life of people that want to keep a licence free stack more difficult.
In the part 1, we saw how to display the number of docs and their sizes per node. In the real life, it helps but we need more than that.